public class Welcome7{
	public static void main(String[] args){
		System.out.println(4*(1-1.0/3+1.0/5-1.0/7+1.0/9-1.0/11));
		System.out.println(4*(1-1.0/3+1.0/5-1.0/7+1.0/9-1.0/11+1.0/13));
	}
}